Method and apparatus for manufacturing slip stopper

Abstract

An easy manufacturing method of a slip stopper, and apparatus therefor, that has a great slip stopping effect and can be used for a location where a problem occurs if a though hole is opened therein. After a protruding portion is formed on a steel plate, by using a first punching die unit, so as to protrude from the upper surface in a plate thickness direction, a concave portion and drain channels are formed in the protruding portion by shear planes that extend substantially perpendicular to the steel plate upper surface and have been half-blanked so as not to open a through hole in the steel plate by using a second punching die unit.

Description

[0001]This application claims priority from JP2002-002651, filed Jan. 9, 2002 through PCT / JP02 / 11741 filed Nov. 11, 2002. The disclosures of the identified documents are enclosed herein by reference thereto.BACKGROUND OF THE INVENTION[0002]1. Technical Field[0003]The invention relates to the technical fields of a method and an apparatus for manufacturing a slip stopper employed for a construction machine, such as a hydraulic excavator, or other surfaces that need to be non-slip.[0004]2. Background Art[0005]Generally, a slip stopper with a slip stopping function is occasionally used for floors, passageways, and stairs in building structures, floors and steps of buses, trucks and special vehicles, decks of railroad vehicles and ships, and scaffolding at construction sites. Such a slip stopper, for example, as shown in FIGS. 10(A)–10(C), has been conventionally known. This is a so-called striped steel plate that has a plurality of projections 51 molded in continuous patterned shape, an...

AI Technical Summary

Benefits of technology

[0009]Thereby, a slip stopper which achieves a great slip stopping effect and can be used for a location where a problem occurs if a through hole is opened therein can be easily manufactured.

[0011]By using the first and second punching die units, a slip stopper which achieves a great slip stopping effect and can be used for a location where a problem occurs if a through hole is opened therein can be easily manufactured.

[0012]The invention can be widely applied in the technical fields of a method and an apparatus for manufacturing a slip stopper for various footings requiring a device to prevent slipping, such as the stepping surfaces of construction machines, floors, passageways, and stairs of building structures, floors and steps of buses, trucks, and special vehicles, decks of railroad vehicles and ships, scaffolding at construction sites, etc. The invention can also be used for a location where a problem occurs if a through hole is opened therein, and is useful in a case where it is necessary to readily manufacture a slip stopper having a great slip stopping effect at low cost.

Problems solved by technology

If the slip stopper having the through hole stamped out is used as it is as a cover to cover the upper surface of a construction machine, problems, such as rainwater or dirt entering the inside of the cover, heated air from an engine blowing upward from the cover, or noise diffusing, are inevitable.

However, the double structure increases production processes and costs in comparison with the single structure and, further, poses a problem in that mud or dust entering through the through hole of the slip stopper accumulates between the slip stopper and the lower side flat steel plate or in the through hole, and makes cleaning difficult.

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